Unify All Launch Indices to 0-based (#211)

Summary:
This PR unifies all launch indices across the codebase to use 0-based indexing, making them consistent with Python conventions and the existing 0-based indexing used in the `info` module and `reproduce` command.

## Changes

- **`tritonparse/trace_processor.py`**:
  - Changed `(parsed_json, i + 1)` to `(parsed_json, i)` on line 304
  - `launch_index_map` now stores 0-based line indices instead of 1-based

- **`website/src/pages/KernelOverview.tsx`**:
  - Updated comment from "(1-based line numbers)" to "(0-based line numbers)"
  - Display logic unchanged (already displays raw values)

- **`website/src/components/DiffViewer.tsx`**:
  - Removed `+ 1` conversion when displaying launch ranges
  - Now displays 0-based launch indices directly

- **`website/src/components/StackDiffViewer.tsx`**:
  - Removed `+ 1` conversion when displaying launch ranges
  - Now displays 0-based launch indices directly

- **`website/src/components/ArgumentViewer.tsx`**:
  - Removed `+ 1` conversion when displaying launch ranges
  - Now displays 0-based launch indices directly

## Breaking Change

**Website Display**: The website will now display 0-based line numbers and launch indices instead of 1-based. Users viewing launch information will see:
- Line numbers starting from 0 instead of 1
- Launch indices starting from 0 instead of 1

## Rationale

- Consistency with Python conventions (0-based indexing)
- Alignment with existing codebase (`info` module, `reproduce` command already use 0-based)
- Simpler code (no need for +1/-1 conversions)
- Better alignment with internal data structures

## Testing

Existing tests continue to pass. The change affects display format only, not core functionality.

Pull Request resolved: #211

Reviewed By: adamomainz

Differential Revision: D88171144

Pulled By: FindHao

fbshipit-source-id: ae0ae41aff010140510e63fada02aa89c5634496

Author: FindHao

tritonparse/trace_processor.py

@@ -300,9 +300,7 @@ def parse_single_file(
             elif event_type == "launch":
                 kernel_hash = parsed_json.get("compilation_metadata", {}).get("hash")
                 if kernel_hash:
-                    kernels_by_hash[kernel_hash]["launches"].append(
-                        (parsed_json, i + 1)
-                    )
+                    kernels_by_hash[kernel_hash]["launches"].append((parsed_json, i))
 
     # Organize lines for final output, keyed by output file path
     all_output_lines = defaultdict(list)

website/src/components/ArgumentViewer.tsx

@@ -12,7 +12,7 @@ const DistributionCell: React.FC<{ data: any }> = ({ data }) => {
             <ul className="list-none m-0 p-0 space-y-1">
                 {data.values.map((item: any, index: number) => {
                     const launchRanges = item.launches
-                        .map((r: any) => (r.start === r.end ? `${r.start + 1}` : `${r.start + 1}-${r.end + 1}`))
+                        .map((r: any) => (r.start === r.end ? `${r.start}` : `${r.start}-${r.end}`))
                         .join(', ');
                     return (
                         <li key={index}>

website/src/components/DiffViewer.tsx

@@ -33,8 +33,8 @@ const DiffViewer: React.FC<DiffViewerProps> = ({ diffs }) => {
             const launchRanges = item.launches
               .map((r: any) =>
                 r.start === r.end
-                  ? `${r.start + 1}`
-                  : `${r.start + 1}-${r.end + 1}`
+                  ? `${r.start}`
+                  : `${r.start}-${r.end}`
               )
               .join(", ");
             return (

website/src/components/StackDiffViewer.tsx

@@ -57,7 +57,7 @@ const StackDiffViewer: React.FC<{ stackDiff: any }> = ({ stackDiff }) => {
          <div className="space-y-2">
           {stackDiff.values.map((item: any, index: number) => {
             const launchRanges = item.launches
-              .map((r: any) => (r.start === r.end ? `${r.start + 1}` : `${r.start + 1}-${r.end + 1}`))
+              .map((r: any) => (r.start === r.end ? `${r.start}` : `${r.start}-${r.end}`))
               .join(", ");
 
             return (

website/src/pages/KernelOverview.tsx

@@ -312,7 +312,7 @@ const KernelOverview: React.FC<KernelOverviewProps> = ({
                   <h4 className="text-md font-semibold mb-2 text-gray-800">
                     Launch Locations in Original Trace{" "}
                     <span className="text-sm font-normal text-gray-500">
-                      (1-based line numbers)
+                      (0-based line numbers)
                     </span>
                   </h4>
                   <div className="font-mono text-sm bg-gray-100 p-2 rounded">